From patchwork Mon Mar 30 23:51:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Nemirovsky X-Patchwork-Id: 244603 List-Id: U-Boot discussion From: alex.nemirovsky at cortina-access.com (Alex Nemirovsky) Date: Mon, 30 Mar 2020 16:51:19 -0700 Subject: [PATCH v4 1/8] mmc: ca_dw_mmc: add DesignWare based DM support for CAxxxx SoCs In-Reply-To: <1585612288-23669-1-git-send-email-alex.nemirovsky@cortina-access.com> References: <1585612288-23669-1-git-send-email-alex.nemirovsky@cortina-access.com> Message-ID: <1585612288-23669-2-git-send-email-alex.nemirovsky@cortina-access.com> From: Arthur Li Initial DesignWare based DM support for Cortina Access CAxxxx SoCs. Signed-off-by: Arthur Li Signed-off-by: Alex Nemirovsky CC: Peng Fan --- Changes in v4: - Rename DT compatible name - Remove uneccessary if-statement to support 8-bit buswidth - Remove redundant error msg - Use symbolic constants in switch statement Changes in v3: None Changes in v2: - Add I2C controller - Add LED controller - Add SPI NAND and NOR controller MAINTAINERS | 2 + drivers/mmc/Kconfig | 11 ++++ drivers/mmc/Makefile | 1 + drivers/mmc/ca_dw_mmc.c | 171 ++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 185 insertions(+) create mode 100644 drivers/mmc/ca_dw_mmc.c diff --git a/MAINTAINERS b/MAINTAINERS index 82e4159..bb45d3c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -180,6 +180,7 @@ F: board/cortina/common/ F: drivers/gpio/cortina_gpio.c F: drivers/watchdog/cortina_wdt.c F: drivers/serial/serial_cortina.c +F: drivers/mmc/ca_dw_mmc.c ARM/CZ.NIC TURRIS MOX SUPPORT M: Marek Behun @@ -670,6 +671,7 @@ F: board/cortina/common/ F: drivers/gpio/cortina_gpio.c F: drivers/watchdog/cortina_wdt.c F: drivers/serial/serial_cortina.c +F: drivers/mmc/ca_dw_mmc.c MIPS MSCC M: Gregory CLEMENT diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 2f0eedc..bb38787 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -205,6 +205,17 @@ config MMC_DW block, this provides host support for SD and MMC interfaces, in both PIO, internal DMA mode and external DMA mode. +config MMC_DW_CORTINA + bool "Cortina specific extensions for Synopsys DW Memory Card Interface" + depends on DM_MMC + depends on MMC_DW + depends on BLK + default n + help + This selects support for Cortina SoC specific extensions to the + Synopsys DesignWare Memory Card Interface driver. Select this option + for platforms based on Cortina CAxxxx Soc's. + config MMC_DW_EXYNOS bool "Exynos specific extensions for Synopsys DW Memory Card Interface" depends on ARCH_EXYNOS diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index 9c1f8e5..615b724 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -20,6 +20,7 @@ endif obj-$(CONFIG_ARM_PL180_MMCI) += arm_pl180_mmci.o obj-$(CONFIG_MMC_DAVINCI) += davinci_mmc.o obj-$(CONFIG_MMC_DW) += dw_mmc.o +obj-$(CONFIG_MMC_DW_CORTINA) += ca_dw_mmc.o obj-$(CONFIG_MMC_DW_EXYNOS) += exynos_dw_mmc.o obj-$(CONFIG_MMC_DW_K3) += hi6220_dw_mmc.o obj-$(CONFIG_MMC_DW_ROCKCHIP) += rockchip_dw_mmc.o diff --git a/drivers/mmc/ca_dw_mmc.c b/drivers/mmc/ca_dw_mmc.c new file mode 100644 index 0000000..198c41f --- /dev/null +++ b/drivers/mmc/ca_dw_mmc.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2019 Cortina Access + * Arthur Li + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define SD_CLK_SEL_MASK (0x3) +#define SD_DLL_DEFAULT (0x143000) +#define SD_SCLK_MAX (200000000) + +#define SD_CLK_SEL_200MHZ (0x2) +#define SD_CLK_SEL_100MHZ (0x1) +#define SD_CLK_SEL_50MHZ (0x0) + +#define IO_DRV_SD_DS_OFFSET (16) +#define IO_DRV_SD_DS_MASK (0xff << IO_DRV_SD_DS_OFFSET) + +#define MIN_FREQ (400000) + +DECLARE_GLOBAL_DATA_PTR; + +struct ca_mmc_plat { + struct mmc_config cfg; + struct mmc mmc; +}; + +struct ca_dwmmc_priv_data { + struct dwmci_host host; + void __iomem *sd_dll_reg; + void __iomem *io_drv_reg; + u8 ds; +}; + +static void ca_dwmci_clksel(struct dwmci_host *host) +{ + struct ca_dwmmc_priv_data *priv = host->priv; + u32 val = readl(priv->sd_dll_reg); + + val &= ~SD_CLK_SEL_MASK; + if (host->bus_hz >= 200000000) + val |= SD_CLK_SEL_200MHZ; + else if (host->bus_hz >= 100000000) + val |= SD_CLK_SEL_100MHZ; + + writel(val, priv->sd_dll_reg); +} + +static void ca_dwmci_board_init(struct dwmci_host *host) +{ + struct ca_dwmmc_priv_data *priv = host->priv; + u32 val = readl(priv->io_drv_reg); + + writel(SD_DLL_DEFAULT, priv->sd_dll_reg); + + val &= ~IO_DRV_SD_DS_MASK; + if (priv && priv->ds) + val |= priv->ds << IO_DRV_SD_DS_OFFSET; + writel(val, priv->io_drv_reg); +} + +unsigned int ca_dwmci_get_mmc_clock(struct dwmci_host *host, uint freq) +{ + struct ca_dwmmc_priv_data *priv = host->priv; + u8 sd_clk_sel = readl(priv->sd_dll_reg) & SD_CLK_SEL_MASK; + u8 clk_div; + + switch (sd_clk_sel) { + case SD_CLK_SEL_50MHZ: + clk_div = 4; + break; + case SD_CLK_SEL_100MHZ: + clk_div = 2; + break; + default: + clk_div = 1; + } + + return SD_SCLK_MAX / clk_div / (host->div + 1); +} + +static int ca_dwmmc_ofdata_to_platdata(struct udevice *dev) +{ + struct ca_dwmmc_priv_data *priv = dev_get_priv(dev); + struct dwmci_host *host = &priv->host; + u32 tmp; + + host->name = dev->name; + host->dev_index = 0; + + host->buswidth = dev_read_u32_default(dev, "bus-width", 1); + host->bus_hz = dev_read_u32_default(dev, "max-frequency", 50000000); + priv->ds = dev_read_u32_default(dev, "io_ds", 0x33); + host->fifo_mode = dev_read_bool(dev, "fifo-mode"); + + dev_read_u32(dev, "sd_dll_ctrl", &tmp); + priv->sd_dll_reg = map_sysmem((uintptr_t)tmp, sizeof(uintptr_t)); + if (!priv->sd_dll_reg) + return -EINVAL; + + dev_read_u32(dev, "io_drv_ctrl", &tmp); + priv->io_drv_reg = map_sysmem((uintptr_t)tmp, sizeof(uintptr_t)); + if (!priv->io_drv_reg) + return -EINVAL; + + host->ioaddr = dev_read_addr_ptr(dev); + if (!host->ioaddr) + return -EINVAL; + + host->priv = priv; + + return 0; +} + +struct dm_mmc_ops ca_dwmci_dm_ops; + +static int ca_dwmmc_probe(struct udevice *dev) +{ + struct ca_mmc_plat *plat = dev_get_platdata(dev); + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); + struct ca_dwmmc_priv_data *priv = dev_get_priv(dev); + struct dwmci_host *host = &priv->host; + + memcpy(&ca_dwmci_dm_ops, &dm_dwmci_ops, sizeof(struct dm_mmc_ops)); + + dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, MIN_FREQ); + if (host->buswidth == 1) + (&plat->cfg)->host_caps &= ~(MMC_MODE_8BIT | MMC_MODE_4BIT); + + host->mmc = &plat->mmc; + host->mmc->priv = &priv->host; + upriv->mmc = host->mmc; + host->mmc->dev = dev; + host->clksel = ca_dwmci_clksel; + host->board_init = ca_dwmci_board_init; + host->get_mmc_clk = ca_dwmci_get_mmc_clock; + + return dwmci_probe(dev); +} + +static int ca_dwmmc_bind(struct udevice *dev) +{ + struct ca_mmc_plat *plat = dev_get_platdata(dev); + + return dwmci_bind(dev, &plat->mmc, &plat->cfg); +} + +static const struct udevice_id ca_dwmmc_ids[] = { + { .compatible = "cortina,ca-mmc" }, + { } +}; + +U_BOOT_DRIVER(ca_dwmmc_drv) = { + .name = "cortina_dwmmc", + .id = UCLASS_MMC, + .of_match = ca_dwmmc_ids, + .ofdata_to_platdata = ca_dwmmc_ofdata_to_platdata, + .bind = ca_dwmmc_bind, + .ops = &ca_dwmci_dm_ops, + .probe = ca_dwmmc_probe, + .priv_auto_alloc_size = sizeof(struct ca_dwmmc_priv_data), + .platdata_auto_alloc_size = sizeof(struct ca_mmc_plat), +};